Line-spacing adjustment for type-writers.



Z. G. SHOLES! LINE SPACING ADJUSTMENT FOR TYPE WRITERS APPucmo'N menAPR. 23, 1915.

1 165,547. Patented Dec. 28, 1915.

aww/ntoz abtqzmm wmm m w g Q ZALMON G. SHOLES, F WILMINGTON. DELAWARE,ASSIGNOR, BY MESNE,ASSIGN- MENTS, TO SHOLES STANDARD TYPEWRITER COMPANY,OF WILMINGTON, DELA- WARE, A CORPORATION OF DELAWARE.

LINE-SPACING ADJUSTMENT FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented Dec. 28, 1915 Application filed April 23, 1915. Serial No.23,443.

' To all whom it may concern:

"Wilmington, in the State of Delaware, have shaped portion of-the frame18 and the.

invented a certain new and useful Improvement in Line- SpacingAdjustment for TypeWriters, of which the following is a full and cleardescription. r

Various constructions have been devised whereby the platen of atype-writer might be provided with a spacing ratchet capable of beingdisconnected from the platen at will to permit the same to be rotatedfreely by hand to bring a given line on the paper to the printing point.I

My present invention relates to an inexensive sim le and easil assembledconstruction for the above named purpose, having the advantage that itprevents any spreading pressure from being brought to bear on the sidesof the frame in which the platen shaft has its bearings. The consequenceis thatthere is no binding 'efiect on the platen, and it turns withequal ease at all times.

My improved construction is shown in a preferred form in theaccompanying draw ings, wherein- Figure 1 is a plan view of my platenmounting, and Fig. 2 is an enlarged vertical section of the same.

The platen proper may have any desired structure. Inthe specific formillustrated there is an inner core 10 of wood or other suitable materialfixed to end pieces 11, which me:' also be of wood or the like. A

filling 12 overlies the core 10, and is made' of a suitablesound-deadening material. Finally a rubber covering 13 envelops all.

A conical head 14 is fixed to the platen, as by screws 15, and theplaten shaft 16 is fixed to this head, carrying a handle 17, and havinga bearing in one side .18 of the frame.

The spacing ratchet 19 is located upon the periphery ofthe hollowconical head 20, and this head has a cylindrical extension sleeve 21which serves as a bearing for the shaft 16, and is itselffree to revolvein a ring 22'. This last named ring is carried by a suitably The sleeve21 has a circumferential groove which isentered by a short screw pin 24,

passing through the ring 22 on one side; whlle, on the opposite side,the end of the handle 25 also passes through the ring 22 and enters thegroove on the sleeve 21. The handle 25 projects outward through a camgroove 26 in the covering plate 23.

Outside of the frame 18, the spiral spring 27 surrounds the shaft16,,being preferably protected by the thimble 28. One end of this springpresses against the outer face of the sleeve 21, while the opposite endpresses the thimble 28 against the hub 29, made fast, with the attachedhandle 17, on the shaft 16. It will thus be seen that the normal actionof the spring 27 is to force the hollow cone 20 over the male cone 14,thus connecting the ratchet 19 with the platen, to permit of control ofthe latter as usual by'the spacing lever 30 and pawl 31. It is clearthat, since the force that presses the cones together for this purposeis a thrust having its outer abutment on the hub 29 which is fast on theshaft, the framework is relieved from all pressure from this cause, andall binding pressure on the platen is prevented.

When it is desired to disconnect the ratchet and platen temporarily, thehandle 25 is moved backward into the position shown in Fig. 1. Thiscompresses the spring by the action of the cam groove 26, and relievesthe pressure between the two cones 14 1. In a typewriter, a frame, ashaft having bearings in said frame, a platen on said shaft, aspacingratchet revolubly mounted on said shaft. within said frame and adaptedto make frictional contact directly with an extension fixed .tosaidplaten, an abutment fixed to said shaft outside of said,

frame, a spring adapted to be normally compressed between said abutmentand said ratchet body, and means for effectively reducing the pressureexerted by said spring through said ratchet body upon said extension onthe platen.

2. In a typewriter, a frame, a platen having a frictional head, a shaftfor said platen, a spacing ratchet having a body adapted to makefrictional connection with said head and also having a-sleevesurrounding said shaft and passing through said frame, an abutment fixedto said shaft outside of said frame, a spring between said .abutment andsaid sleeve and means for said spring through said sleeve and ratchetupon said frictional head, I 3. In a typewriter a frame, a platen havinga conical head, a shaft for the platen, a hollow cone'fitting said headand carrying aspacing ratchet, a sleeve extending from said'hollo'wbody, said sleeve passing through said frame and forming a bearing forsaid shaft, an abutment on the shaft, a spring surrounding said shaftand normally compressed between said abutment and said sleeve, and meansadapted to remove said hollow cone from said head on the platen.

ZALMON e. sHoLEs.

fiopies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents, Washington, 1). 0. Y I

